History and prospects of heat transformation

摘要: Abstract Following a short description of some historic events the basic theory heat transformation published 50 years ago by Nesselmann is presented. Here discussed primarily with respect to house heating. Firstly, single stage plants and their COP are discussed, then problems multi-stage processes looked at. One main today identify new suitable working pairs for absorption pumps. Only few substances seem be suitable. Finally inverse pumps (for upgrading waste heat) as well substance transformer discussed.